用PWM产生锯齿波，应使PWM寄存器中的值线性增加，那么在PWM输出端将得到宽度线性增加的脉冲波，经滤波后，便可得到锯齿波。-have used PWM ramp, it should PWM register with the value of linear increase, then the PWM output will be increased linearly width of the pulse wave, filter, which will be ramp.

STM32F103RC配置输出多路PWM波形,最多输出了24路PWM，经过调试每一路都正常，附件中有管脚分配图。-STM32F103RC configure multiple PWM output waveform, output up to 24-way PWM, after commissioning are normal in every way, the annex has pin assignment chart.